Solve the problem.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 160 seconds are required to make a 
enlargement, find the time required for a 
enlargement.
A. 504 sec
B. 448 sec
C. 392 sec
D. 560 sec
Answer: B
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Find the area of the specified region.Inside the three-leaved rose r = 4 cos 3?
A. 8?
B. 4?
C. 
?
D. 2?
Solve the problem.Using the following floor plan, find a path that begins and ends in room A and passes through each doorway exactly once.
A. A ? D ? C ? A ? B ? D ?A B. No such route exists. C. A ? D ? C ? A ? B D. A ? B ? A ? C ? D ? A
Using a calculator, evaluate to four decimal places.log 6664
A. 8.8045 B. 3.3237 C. 9.3045 D. 3.8237
Solve the problem.Two low-frequency sound waves with similar frequencies, producing the pressures 
and 
combine to form a pressure P = P1 + P2 . The variable t is time measured in seconds. Graph P in 
by 
and use the graph to determine the frequency of the displayed beats.
A. 6 beats per second B. 7 beats per second C. 3 beats per second D. 10 beats per second